Astonishing Thor #2

Blasted back into space by the Stranger, Thor hurtles across the solar system, trying to overtake Ego and deter him from reaching his final destination: the museum of Taneleer Tivan - The Collector. What business would Ego have at the museum? What would entice a living planet out of its orbit? And why is Zephyr at the museum, collaborating with The Collector?